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Single Sided Aluminum LED Circuit Board

Single Sided Aluminum LED Circuit Board

Single sided aluminum LED circuit board 1.production describe Specification We combine our years of experience and the latest in manufacturing technology in order to ensure a quality product in a timely manner. Uniwell manufactures PCBs with various materials including polyimide FR4, aluminum,...

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Single sided aluminum LED circuit board
1.Production describe 

图片185_副本.jpg

Specification
Layer: 1  
Board Thickness: 1.55 mm
Surface treatment: immersion gold.
Material: Alu-Core.
Min line width/line distance:10/10mil

We combine our years of experience and the latest in manufacturing technology in order to ensure a quality product in a timely manner. Uniwell manufactures PCBs with various materials including polyimide FR4, aluminum, teflon and copper bases. PCB surface finish includes HASL, immersion gold, immersion tin, immersion silver. Uniwell manufactures based on IPC guidelines and complies with ISO-9001-2008 and RoHS standards.

2.Capability and technologies
Since Uniwell Circuits found in 2007, we has built up a powerful R & D team to improve our technology.

Material

FR4,CEM-3,Metal Core,

Halogen Free, Rogers, PTFE

Max. Finishing Board Size

1500X610 mm

Min. Board Thickness

0.20 mm

Max. Board Thickness

8.0 mm

Buried / Blind Via (Non-cross)

0.1mm

Aspect ration

16:01

Min. Drilling Size(Mechanical)

0.20 mm

Tolerance PTH/ Pressing fit hole /NPTH

+/-0.0762 mm / +/-0.05mm / +/-0.05mm

Max. Layer Count

32

Max. copper (inner/outer)

5OZ/10 OZ

Drill tolerance

+/-2mil

Layer to layer registration

+/-3mil

Min. line width/space

2.5/2.5mil

BGA pitch

8mil

Surface treatment

HASL, Lead free HASL,

ENIG, Immersion silver/Tin, OSP

3.Little knowledge--- PCB material selection guide
Printed circuit board is the most important part of electronics. Alternately, the acronym has also accounted for printed wiring boards and printed wiring cards, which are essentially the same thing. Due to the crucial role of these boards in everything from computers to calculators, PC board material selection should be undertaken with care and knowledge for electrical necessities of a given piece of equipment.

Before the development of the PCB, circuit board materials were mostly covered by nests of entangled, overlapping wires that could easily fail at certain junctures. They could also short circuit once age took hold and certain wires started to crack. As could be expected, the manual process that went into the wiring of these early boards was confusing and painstaking.

As an increasing variety of everyday electronic components began to rely on circuit boards, the race was on to develop simpler, more compact alternatives, and this led to the development of the material, PCB. With PCB materials, circuits can be routed between a host of different components. The metal that facilitates the transfer of current between the board and any attached components is known as solder, which also serves a dual purpose with its adhesive qualities. 

PCB Material Composition
PCB generally consists of four layers, which are heat laminated together into a single layer. 

The material used in PCB from top to bottom includes Silkscreen, Soldermask, Copper and Substrate.
The last of those layers, substrate, is made of fiberglass and is also known as FR4, with the FR letters standing for "fire retardant." This substrate layer provides a solid foundation for PCBs, though the thickness can vary according to the uses of a given board.

A cheaper range of boards also exist on the market that don't utilize the same aforementioned PCB materials, but instead consist of phenolics or epoxies. Due to the thermal sensitivity of these boards, they tend to lose their lamination easily. These cheaper boards are often easy to identify by the smell they give off when being soldered.

PCB second layer is copper, which is laminated onto the substrate with a mixture of heat and adhesive. The copper layer is thin, and on some boards there are two such layers - one above and one below the substrate. PCBs with only one layer of copper tend to be used for cheaper electronics devices.

The massively-used copper clad laminate (CCL) can be classified into different categories according to different classification standards including reinforcing material, used resin adhesive, flammability, CCL performance. The brief classification of CCL is shown in the following table.

Classification Standard

Material

Reinforcing
Material

Paper base class

PF resin (XPC, FR1, FR2)
Epoxy resin (FE-3)
Polyester resin

Glass fiber cloth base class

Epoxy resin (FR4, FR5)

Composite epoxy material (CEM)

/

Lamination multilayer base class

/

Special material base class

BT, PI, PPO, MS

Flammability

Flame-proof type

UL94-VO, UL94-V1

Non-flameproof type

UL-94-HB

CCL Performance

CCL with ordinary performance

/

CCL with low dielectric constant

/

CCL with high heat resistance

/

CCL with low coefficient of thermal expansion

/

Above the green soldermask is the silkscreen layer, which adds letters and numerical indicators that make a PCB readable to tech programmers. This, in turn, makes it easier for electronics assemblers to place each PCB in the proper place and in the right direction on each component. The silkscreen layer is usually white, though colors such as red, yellow, gray and black are also sometimes used.

4.FAQ
Q: Why you can trust our products?
What Uniwell 's vision is to make our customer's products better, so we try our best to fulfill the quality control system and environmental management system. Our approved certification including ISO9001:2008, ISO14001:2004, ISO/TS16949:2009, OHSAS18000, UL, RoHS, QC080000, CQC.

Q: What kinds of test function will be offered?
To make sure the production quality, we offer the below testing procedure to guarantee every piece of product:
1) AOI (Automated Optical Inspection)
2) Automatic short-circuit testing
3) RoHS detector
4) Dielectric tester
5) Impedance control
6) Metallographic microscope
7) Fly probe/ fixture mold
8) Visual inspection

Q: What kinds of quality raw materials will be used?
We use top raw materials as below, ensuring product quality from the source.
Board Brand: ITEQ, SY,KB, Isola, Rogers, Arlon, Nelco, Taconic, Hitachi, etc
Potion: Rohm&Haas, Atotech, Umicore
Printing Ink: Taiyo, Rongda
Dry Film: Asahi, Dupont, Etertec

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